I bought the QHY, I'm sure I read somewhere that the sensor was the same as the ZWO but I can't find that now
it worked out cheaper than the ZWO too.
Can't say I've had more than a couple of quick sessions with it, the weather has been craptastic here in Sydney since
The QHY comes with EZ Planetary and it's easy to use and I find I get the best frame rates with it, but I haven't attempted ROI with Firecapture yet.